root / Ganeti / HTools / Instance.hs @ 47a8bade
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{-| Module describing an instance. |
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The instance data type holds very few fields, the algorithm |
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intelligence is in the "Node" and "Cluster" modules. |
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-} |
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module Ganeti.HTools.Instance where |
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data Instance = Instance { mem :: Int -- ^ memory of the instance |
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, dsk :: Int -- ^ disk size of instance |
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, pnode :: Int -- ^ original primary node |
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, snode :: Int -- ^ original secondary node |
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, idx :: Int -- ^ internal index for book-keeping |
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} deriving (Show) |
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create :: Int -> Int -> Int -> Int -> Instance |
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create mem_init dsk_init pn sn = |
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Instance { |
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mem = mem_init, |
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dsk = dsk_init, |
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pnode = pn, |
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snode = sn, |
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idx = -1 |
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} |
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-- | Changes the primary node of the instance. |
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setPri :: Instance -- ^ the original instance |
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-> Int -- ^ the new primary node |
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-> Instance -- ^ the modified instance |
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setPri t p = t { pnode = p } |
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-- | Changes the secondary node of the instance. |
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setSec :: Instance -- ^ the original instance |
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-> Int -- ^ the new secondary node |
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-> Instance -- ^ the modified instance |
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setSec t s = t { snode = s } |
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-- | Changes both nodes of the instance. |
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setBoth :: Instance -- ^ the original instance |
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-> Int -- ^ new primary node index |
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-> Int -- ^ new secondary node index |
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-> Instance -- ^ the modified instance |
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setBoth t p s = t { pnode = p, snode = s } |
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-- | Changes the index. |
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-- This is used only during the building of the data structures. |
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setIdx :: Instance -- ^ the original instance |
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-> Int -- ^ new index |
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-> Instance -- ^ the modified instance |
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setIdx t i = t { idx = i } |